甚麼是「彩明度」?

"彩明度"=Color-Brightness tells us how strong a color is.
For example, the sun has a high brightness, while a birthday candle has a low brightness. Colors like whites and yellows have a high brightness. Colors like browns and grays have a medium brightness. Colors like black have a low brightness.


As an example, here are several blueish squares. As you go from left to right they increase in brightness.


圖片參考：http://www.thetech.org/exhibits/online/color/brightness/bar.gif